Feed-mill.



A. INGRAHAM.

REED MILL. APPLICATION FILED JAN. 29, 1910.

Patented Ma 21, 1912.

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m/utA/w/P Patented May 21,1912.

FEED MILL.

APPLICATION FILED mmae, 1910.

A. INGRAHZAMQ UNITED STATES TPATENT OFFICE.

ALEXANDER INGR IIAM, 0F MINNEArOLIs, MINNESOTA, AssIoNoR To WILLEORI)MANUFACTURING COMPANY, OE MINNEAPOLIS, MINNESOTA, A CORPORATION OEMINNESOTA.

FEED-MILL.

Patented May 21, 1912.

Application filed January 29, 1910. Serial'No. 540,878.

To all whom it may concern:

Be it known that I, ALEXANDER INGRA- HAM, of Minneapolis, Hennepincounty, Minnesota, have invented certain new'and useful Improvements inFeed-Mills, of which the following is a specification.

The object of my invention is to provide a mill in which different kindsof grain can be ground at the same time and mixed after grinding, or onekind of grain may be fed through the first and second break rolls, saidrolls being capable of convenient adjustment toward or from one another.

The invention consists generally in various constructions andcombinations, all as hereinafter described and particularly pointed outin the claims. 2

In the accompanying drawings forming part of this specification, Figure1 is an end view of a feed mill embodying my inven tion, Fig. 2 is avertical sectional view of the same, Fig. 3 is a front View of the mill,Fig. 4 is a detail sectional view of the mechanism for adjusting therolls, Fig. 5 is a detail View illustrating the means for utilizing themill to grind different kinds of grain.

In the drawing, 2 represents the casing of the mill having an upper part3 provided with a hopper 4 to which the material to be ground isdelivered through the spout 5.

' This hopper has a feed roll 6 provided with recesses in its periphery,and a slide 7 controlled by a rack and pinion 8 that is operated bymeans of a crank 9 to obtain the desired adjustment of the slide.

10 represents the side plates secured to the casing 2 and these platesare provided with vertically arranged hollow ribs or webs 11, which arepreferably cast integrally with the plates and extend from the top tothe bottom thereof, as indicated in Figs. 1 and 4. These ribs extendoutwardly a considerable distance from the side plates of the casing andbrace and strengthen these plates against the strain of the rollsthereon, and I am therefore able to use lighter side plates than wouldbe necessary if the ribs were omitted. Furthermore, the ribs presentbroad surfaces to which the roll bearings may be secured, and I am ableto use longer bearings than is generally possible in machines of thistype, and the bearings being supported by the ribs, the strain is thrustthereon and not directly upon the plates, which would be the case wherehubs are provided on the outside of the plates.

The first break rolls 12 and 13 have their shafts 14 and 15 journaled inboxes 16 and 17 on the webs 11, outside the end plates of the casing.The boxes 16 are stationary on brackets 18, while the boxes 17 arecarried by arms 19 journaled at their upper ends in bearings 20 oneccentric pins 21 which are capable of rotary adjustment for the purpose of raising or lowering the boxes 17 and the roll carried thereby.The lower ends of the arms 19 have hubs 22 thereon, 'slidable on rods 23which are pivoted on eccentric pins 24 on the end plates and projectthrough holes 25 in the ribs 11. Springs 26 are carried by the said rodsand adjusting wheels 27 and 28 are mounted on the threaded ends of saidrods for the purpose of increasing or decreasing the tension of saidsprings and moving the roller 12 toward or from the roller 13. Sleeves29 are interposed between the wheel 27 and the hubs 22 and washers 30have lugs 31 fitting within depressions in the ends of the hubs 22, theends of the sleeves 29 bearing on these wash-- ers and holding them incontact with said hubs and forming rocking bearings thereon. Each sideof the mill is equipped in a similar manner and by the operation of thewheels 27 and 28 the arms 19 may be oscillated to adjust one roll withrespect to the other one. The springs 26 will allow the arms to yieldand the rolls to separate when any foreign material passes between them.I

-A second set of rollers32 and 33, which I may designate as the secondbreak rolls, are providedbelow the rolls 12 and 13, an inclined feedboard 34 being arranged between them, and these second break rolls aremounted in a similar manner and are capable of adjustment in the mannerdescribed with reference to the first break rolls and I will thereforedesignate the mechanism for operating these rolls by the same referencenumerals with the addition of the exponent a. The pin 24 iseccentrica-lly mounted and for the purpose of operating both movablerolls simultaneously, I provide an arm 34 on the eccentric 24 connectedby a link 35. with one arm of a bell crank 36 on the eccentric 24 Theother arm. of said bell crank is connected by a link 37 with a lever 38that is pivoted on the front of the machine and normally locked by meansof a clamping screw 39. By the operation of this lever the movable rollsl2 and 32 can be adjusted simultaneously through the eccentricconstruction of the pins 24 and 24*.

The feed board, between the upper and lower sets of rolls, is preferablyformed in two sections, 34 and 34, hinged together at a point preferablynear the center of the board, and a plate 34 is fastened to one of thesections and assumes the position indicated in Fig, 5 when the board isadjusted, to adapt the mill for hamdling two kinds of grain at once. Inthis case the plate 34: will extend up to a point near the surface ofthe roller 13 and prevent any of the material that is fed through. therolls 12 and 13 from passing down into the rolls 32 and 33. When themachine is used for grinding two kinds of grain, as indicated in Fig. 5,the door in the casing is removed, and a feeder 41 placed thereover inposition to direct the grain to the rolls 32 and 33. The material,passing through the two pairs of rolls, will then drop to the bottom ofthe mill and may be mixed, if desired, after grinding. The driving shaft42 has a box 43 vertically movable in a guide 414 and operated by meansof a screw 45 for belt tightening purposes.

I claim as my invention:

1. A feed mill comprising a casing having end plates provided withvertically arranged hollow ribs, said ribs projecting outwardly fromsaid plates and having openings formed in their side faces, arms havingeccentric bearings within said openings, a roll having bearings in saidarms, a second roll having bearings on said ribs on the op posite sidethereof from said openings, and means for oscillating said arms, for thepurpose specified.

2. A feed mill comprising a casing having end plates and verticallyarranged hollow ribs formed thereon, said ribs projecting outwardly fromsaid plates and bracing and strengthening the same, said ribs havingopenings in one of their side walls, arms journaled above said openingsand depending therein, a roll having bearings in said arms, a secondroll having bearings on said ribs on the opposite side thereof from saidfirst named roll, and means extending through said ribs and engaging thelower ends of said arms to oscillate the same.

In witness whereof, I have hereunto set my hand this 20 day of January1910.

ALEXANDER IN GRAHAM.

Witnesses:

L. C. CRoNnN, J. A. BYRNES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

